Edible protein per unit area of land
Edible protein per unit area of land is a measure of agricultural productivity. This measure for various major foodstuffs is shown in the chart below. Values are expressed for one calendar year. Biological Values and usable protein values have been added to the chart to show the true relative value of each foodstock for human consumption. Usable protein values are determined by the Biological Value of each foodstuff and represent the amount of protein that is fully digested by humans, it is calculated as follows (Edible protein * Biological Value = Usable protein).
Edible protein |
BV |
Usable protein |
||
|---|---|---|---|---|
(g/m²) |
(lb/acre) |
(%) |
(g/m²) |
(lb/acre) |
Soybeans |
40.0 |
356 |
74 |
29 |
Rice |
29.0 |
260 |
86 |
25 |
Legumes (average) |
22.0 |
192 |
49 |
11 |
Milk |
9.2 |
82 |
91 |
8.4 |
Wheat |
15.0 |
138 |
54 |
8.1 |
Eggs |
8.5 |
76 |
94 |
8.0 |
Maize |
24.0 |
211 |
32 |
7.7 |
Meat (average) |
5.0 |
45 |
80 |
4 |
Beef |
2.2 |
20 |
78 |
1.72 |
Selected averages as computed in the 1970's |
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See also
- Essential amino acids
- Biological Value
- Protein
References
- John Lobell (1981); The Little Green Book: A Guide to Self-Reliant Living in the 80's. Boston: Shambhala. ISBN 0-394-74924-3